This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Detail Da Vinci codex du vol des oiseaux Luc Viatour. Detail Codex flight of the birds by Leonardo da Vinci Le codex du vol des oiseaux par Lonard de Vinci Photography own work lucnix be www lucnix be Photography Luc Viatour Photography User Lviatour GFDL Ccbysa migrated ccbysa Luc Viatour GFDL Ccbysa migrated ccbysa Luc